Hennigan Family History
Hennigan Name Meaning
Irish (Mayo and Sligo): Anglicized form of Gaelic Ó hEidhneacháin ‘descendant of Eidhneachán’ a personal name apparently based on the word eidheann ‘ivy’. A shortened form has been Anglicized as Heenan .
Source: Dictionary of American Family Names 2nd edition, 2022